Safety device for gage-glasses.



T. I". TRUDEAU. SAFETY DEVICE FOR GAGE GLASSES.

APPLICATION FILED APR.16. 1917- Patented Oct. 2, 1917.

' [NVE/WOR. MM. May/M A TTORNE Ys.

,KMU

W I TNESSES .between the ylatter; and,held-ley into a protecting position rr sitez Afinl n JOHN LEWIS' PERKINS,

OF HOLYOKE, MASSACHUSETTS. j

sAEE'iY envien nony enen-GLASSES.:

To' 'all w hom may concern 1 Be it 'known that I, THEoDoRr: FELIX TRU- DnAU, a subject of the Dominion ot Canada,

the county oiV residing at vli'llim'an'sett, inv Hampden and State of Massachusetts, have invented certain 'new andv useiullmprovements in Safety Devices 'for Gage-Glasses, of which the following is afspeciication.

This invention relates y to protecting devices ior gage' glasses.

inA object ofthe invention is to provide in adeviceo the class described, a protecting shield adapted to he gage glass to serve as 'a background therefor, and movable in an emergency toa position in glass to 'serve 'as' axshield Jfor the gage Icocks.

Another obj ect :of the invention is :toptovide in a vdevi'ceoi .thewclass described, ga lprotectin'g shield larranged to svving circumier! ential'l'y around the gage ,glass Vand adapted normally to be pos'tioned in the rear there-A of; and appropriate means tomove the shield peripheral portion 'of the-'gage :glass -is 'encompassed by ther shield,l whereby,l .in event the gage" glassbursts, the .escaping-.steam may be deflected 'from Another object of thel invention is to pro'- vide a protecting device involving. a movable shield, which may be ard'V gage glasses Without moditication'in the latter and Fig. y3 "is fa 'side elevational view showing the shield in protecting position.'`

Referring to these drawings, in detail, reference a Aindicates the Water col-umn of a boiler into Which are threaded ythe usual upper .and lovvergage cocks l). Mounted *A Specification of Letters Patent. v

be normally positioned inl front of the gage.

wherein. the front the `gage glass cocks.`

attached tofsta'ndf` which may be readily removed when desired,- to permit convenient replace the position n f thus positioned, the shield-'occupies both show-n for illustrative pur .is al sectional plan view taken on.

glands 0 in the usual lmanner is the gage glass Mounted on each gage cock b 'be-' lovv its 'gland cis a bracket e which., asV

shown in Fig. 2, isprovided With tvvol per-x1 n vPatented. 1591.7.A i 'Appn'ann 'neaAp-rn re, 1917. sferiaino. 162,364. l

construction to support a pair `oi' vertical l rods,- .which are .arranged .parallel with the gage glass as a protecting means to prevent damage thereto; These protecting rods are not -used With this inventiomand the removal of the lrods is the only change neces.

sary in any standard gage construction `in order that 'the invention maybe applied.

The .brackets Y e A yheretofore described aroemployed-as supporting means for the gage glass shield.A Each. plate e lsupports ai semi- Vcircular trackvvay (FigQ) which is held to the' late in horizontal position bya screnT j' be noted that the brackets e do.V

6. 'It is to not have to be drilled -to receive screw 6 for one oi' the'holes therein, formerly used for the protecting rods, in Fig. '2'. The .trackvvays 5^are preferably arrange@` -in concentrical. relation vviththel gage yglass d and extend through an arc'of one hundred and eighty degrees on one side only 'of the gage glass d. As vievvedin Fig.: 2, thetrackvv'ays may be said to cover one` upper and one lower quadrant(` The acentfaces of'trackvvays 5 are grooved as indicated in Figs. 2 and 3 to receive a shield `7. 'The latter is preferably -for'm'ed by bendinga rectangular blank oli sheet metal into semiis employed as indicated cylindrical iorrn'; Shield 7 Jfreely slidable' l in vthe trackvvays 'shovvn 5 and normally occupies inA Figs. l and Y2. When` upper quadrants as viewed in Fig. `Zand overlaps thetrackvvay oran angle of ninety l degrees;

l Fixed to`shield7- is an eye 8 (Figs. 1- and 2) y'and secured thereto is lalleXible' cord 9 which extends around vthe back of the in Fig. 2, Aand passes (Fig. ATi)- ormed on the From eye `10,the -cord '9 to :any desired 'position lfor a distance from Shown in Fiesf lenta-.S9 that the glass is to be replaced for the gage cocks must first be closed to shut off the escap-l ing water and steam. Ordinarily, the cocks b must be closed in the face of a cloud of escaping steam which is a dangerous operation. Vith the device described, however,

The knot l1 is so-located that the shield? Y there `is no chance of injury to the fireman in closing the gage cocks. He simply pulls cord 9`as'far as it will go which operation causes the shield 7 to move through anarc of one hundred and eighty degrees from the position shown in F ig. 1 to that shown in Fig. 3. The'shield now lies in the two lower'quadrants, as viewed in F ig. 2, andl eyes 8 and l0 arey positionediin vertical alinement. The cloud` ofv escaping steam will thus bedeiiected by the shield so that cocks` may be closed offwithout difiic'ulty. Hav# ing closed off-'cocks fb, the broken glasscl must then vbe replaced, and, to permit this operation yto be conveniently v performed,

shield 7 is turned by hand through a'further arc (ninety degrees in a counterclockwiseV 1 directionA as viewed in Fig.2) until the shield is entirely removed `from `its guiding and supporting trac'kways. rihe `shield is allowed to drop and the. knot 11 in' cord 9 comes into abutment, with the eye 1Y0 to limit the falling movement of the shield.

Y assumes av position substantially* as indicated by dotted lines in Fig. 8. vWith the shield thus removed, therey is nothing to interfere with the operation of replacing glass d. Once the latter hasfbeen replaced,

the shield'? is also replaced and preferably in the guarding or protecting position shown in Fig. 3. AThe fireman may then safely open cocks b with the assurancethat he will ybe protected by the. shield .in event the new glass immediately breaks. If the glass does not burst, the shield is movedl tov its original'position ready for use inanother emergency.V -Y @A y Thus, I have provided a protecting device for gage glasses structural simplicity Vand effectiveness inv -operationffor protecting purposes. It is recognized that modications may be made in the structure herein described without vdeparting from thevscope of the invention which is defined by the appended claims rather `than by the foregoing description of a preferredforli@P ,which is characterized by What I claim is- 1. A safety attachment for a gage glass y device, comprising in combination supporting and guiding means adapted forV attachment to said device, a shield mounted in said means and constructed to turn about the gage glass, said shield arranged normally in the rear ofthe latter, and means to turn the shield into a protecting position, in front of the gage glass. i 2. A safety attachment for a gage glass device, comprising, arcuate trackways adapt" ed to be attached in lspaced relation to said device, an arcuate shield supported in; said trackways and adapted to slide circum-` ferentially around the 'gage glass, said shield being normally v disposed behind the gageglass as a background therefor, and ymeansy to move the shield into a protecting position in front of the gage glass.

3. A protecting attachment for a gage glass device, comprising substantially semicircular trackways adapted to be secured in horizontal position andin vertically, spaced` relation to said device, al shield having a substantially semi-cylindrical surface and arranged to extend'between said trackways, said shield being normallyv arranged `to encompass the rear peripheral portionofthe gage glass, andy means kto move the shield into a 'protecting positionA wherein the shield encompasses-thefront peripheral portion of thegageglassw 4L.V A protecting attachment for a gage glass device, comprising, upper and` lowerA semi-circular tracks adapted vto `be secured to said deviceV and constructed to extend from the rear to the frontfof the gage glass to surround a side. peripheral portion thereof, a shield. having ta substantially semi-cylindrical surface and arranged to eX- tend between-said tracks, said' shield being normally supported by a partial overlap withthe `tracks in a position'to surroundl therear peripheral portion-of 'thegageglass,4 110 means to move the shield substantially half a revolution around the gageglass to a protecting position l wherein the shield surrounds the front peripheral portion of theV gage glass, said shield adapted to drop from said tracks when moved through a further angle, andmeansto supportl the disconnected shield at a distance below the gage glass device., Y l v n' A5. The combination'witha gage glassandv 12o gage glass rod brackets, of trackwavs adapted forI connection tothe latter, a shield extending between the trackways andvcon'- structed to'swing in an arcuate path around the gage glass, said shield being normally arjranged to encompass the rear peripheral portion of the gage glass, means vto move the shield into protecting position 2wherein the front peripheral portion ofthe gage glass is encompassed, said trackways constructed i3() and arranged to permit disconnection of said means and constructed to turn about the said shield on further movement from its gage glass, said shield arranged-normally in protecting position. the rear of the latter, and means operable at 10 6. A safety attachment for a gage glass a distance to turn the shieldinto a protect- 5 device, comprising in combination, supporting position, in front of the gage glass.

ing and guiding means adapted for attachment to said device, a shield mounted in THEODORE FELIX TRUDEAU.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

